Lock.



Patented July 24, I900 A. PICKEN.

LOCK.

(Application filed Nov. 1, 1898.)

(No Model.)

III/111471 NITED STATES- PATENT OFFIC.

AROHIBALD PIOKEN, OF ROANOKE, VIRGINIA, ASSIGNOR OF ONE-HALF TO CHARLES F. BYRNE, SAME AND SAMUEL NYBURG, OF NEW 1 being indicated in dotted lines.

YORK, N. Y.

' nocK.

SPECIFICATION, forming part of Letters Patent No. 654,322, dated July 24, 1900. Application filed November 1, 1898. Serial in. 695,160. on model.)

To aZZ whom, it may concern:

Be it known that I, ARCHIBALDPICKEN, a

citizen of the United States, residing at Roan- 0ke,in the county of Roanoke and State of Vir ginia, have invented a new and useful Look,

of Which the following is a specification.

My invention relates to looks, particularly door-locks; and the object in View is to provide an improved reversible lock adapted for use in connection with either a right or left hand door, wherein the operation of the bolt by means of a key inserted from one side of the lock is prevented by a key arranged in the other side of the lock, wherein a key inserted into the look from either side may be removed after shooting the bolt, whereby the dislodging or turningof a key arranged in one side of the lock is prevented from the other side of the lock, and wherein a View of the interior of an apartment through'the keyholes is prevented. 1

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a view of a lock constructed in accordance with my invention with one of the side or face plates omitted, the keyhole of the omitted side plate Fig. 2 is a similar view with the locking-bolt omitted. Fig. 3 is a view similar tO'Fi'gJl, showing the parts in the positions which they assume when the key is turned to tilt the rocking guard-lever preparatory to moving the bolt from one of its adjusted positions to the other and indicating a portion of the inner side or faceplate to show therelative locations of the keyholes in opposite sides of the lock cajsing. "Fig. lisa sectional view'of the lock, showing a modified construction of means for securing the bolt in its locked and unlocked positions. Figs. 5 and 6 are detail views ofportions, respectively, of the bolt and guard-lever to show the locking projections carriedrespectively thereby in the modified construction of lock illustrated in Fig. 4..

Similar reference characters indicate corresponding parts in all the figures of the drawings.

1 designates a lock-casing in which is mounted to slide a locking-bolt 2, having a "longitudinal slit3 operating in connection opposite side or face plates of the casing, said key-ward notches having the usual opposite cam-faces for engagement by the ward of the key.

Fulcrnmed at an intermediate point, as upon the guide post or pin 4:, is a rocking guard-lever 9, having its opposite arms arranged, respectively, contiguous in the normal position of the lever to the keyholes 7 and 8 and upon the" same side of both keyholes, whereby when one arm of the rocking lever is moved by means of a key to release the bolt theother arm of said lever crosses the keyhole-slot in the other or opposite side or face plate of the casing, the extremities of said rocking lever being disposed normallyin the paths of key-Wards entering the key-ward notches of the bolt. Also in operative rem tion with this rocking guard-lever is a catch 10, pivoted, as at 11, and provided near its free end with a stop-pin 12 for engagement with either side of an ear or projection 13 on the bolt, said catch being actuated'by a spring 14:.

The operation of the lock is as follows: VVi'th the parts arranged as illustrated in Fig. 1namely, withthe locking-bolt shot orin its engaging position-the turning of a key 15, in-

serted through the keyhole 7, will first tilt thelar operation accompanies the movement of the key in the opposite direction.

The advantage of the lock above described resides in the fact that while a key remains in the keyhole in one side of the lock-casing the lock cannot be operated by a false key nd person also entitled to occupy the room may gain entrance, said inside key may be removed. Also it will be seen that the keyholes are arranged in opposite sides of the lock-casing or out of alinement, whereby neither can aview of the interior of a room be had through the keyholes, nor can a key arranged in the keyhole in one side of the lock be dislodged by introducing a tool through the keyhole in the opposite side of the lock, nor can the key in one side of the lock be turned by means of pliers inserted in the keyhole from the other side of the lock. Furthermore, it will be seen that the lock is reversible, owing to the fact that a key by which the bolt has been shot need not remain in the lock until the bolt has been returned to its normal or interlocked position. In other words, the device operates substantially as a lock of the ordinary construction, with the exception that when a key is left in one side thereof the movement of the bolt by a key or other tool inserted from the opposite side is impossible.

In the modified construction illustrated in Figs. 4 to 6, inclusive, the means for locking the bolt in either of its adjusted positions consist of a lateral projection 16 on the bolt engaged by a projection 17 on the guard-lever, said projection 16 being adapted for arrangement upon either side of the plane of the projection 17, according to whether the bolt is in its locked or unlocked position, and being held against movement except when the projection 17 is displaced by the rocking of the guard-lever.

Inasmuch as my invention refers solely to the look mechanism, I have deemed it unnecessary to illustrate a latch mechanism in the drawings; but it will be understood that any ordinary or preferred form of latch mechanism may be employed in the same casing and also that various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is- 1. In a lock, the combination of a casing having non-alined keyholes in its opposite sides, a bolt having spaced ward-notches, a rocking guard-lever fulcrumed at an intermediate point with its extremities arranged adjacent, respectively, to said keyholes, and upon thesaine side thereof, whereby the movement of the guard-lever by a key inserted through one keyhole causes the other arm of the guard-lever to traverse the keyhole in the opposite side of the casing, a bolt, and a yielding catch, actuated by said guard-lever and provided with means for engaging and securing the bolt in either of its adjusted positions,

through the other keyhole, and a yieldingcatch, actuated by the guard-lever and provided with a pin for engagement with spaced projections on the bolt, substantiallyas specified.

3. In a lock, the combination of a casing having non-alined keyholes in its opposite side plates, a bolt, locking devices for the bolt, and a guard-lever controlling said looking devices, and fulcrumed at an intermediate point to traverse one of said keyholes when operated by a key arranged in the other keyhole, whereby a key arranged in the second-named keyhole serves as a stop to limit the movement of the guard-lever and prevent the operative movement of a key arranged in the first-named keyhole, substantially as specified.

4. A look having its casing provided in opposite sides with non-alined keyholes, in combination with a guard-lever mounted in the casing in the path of the operative movement of a key arranged in either keyhole, and adapted, when actuated by a key in one keyhole, to traverse the other keyhole, whereby a key arranged in the second-named keyhole forms a stop to limit the movement of the guard-lever and check the operative movement of a key in thefirst-named keyhole, substantially as specified.

5. A look having its casing provided with non-alined keyholes, a bolt having a plurality of key-notches accessible by keys arranged respectively in said keyholes, and an intermediately-fulcrumed guard-lever having its arms arranged respectively in the paths of keys arranged in said keyholes; whereby, when a key is arranged in one keyhole, said guard-lever is locked by the key-shank against movement by a key arranged in the other keyhole, substantially as specified.

6. A look having its casing provided with, non-alined keyholes, a bolt having a plurality of keynotches accessible by keys arranged respectively in said keyholes, and an intermediately-fulcrumed spring-actuated guardlever having its arms arranged respectively in the paths of keys arranged in said keymy own I have hereto affixed my signature in holes; whereby when akey is arranged in one the presence of two Witnesses. keyhole, said guard-lever is locked by the key-shank against movement by a key ar- AROHIBALD PIOKEN' 5 ranged in the other keyhole, substantially as Witnesses:

specified. S. NYBURG,

In testimony that I claim the foregoing as GEO. W. HOUSON. 

